PixelPaint+LibGfx: Allow resizing images and layers

This PR adds resize ability to PixelPaint as per issue 11862.
The previous behaviour was to always rescale the canvas when
resizing an image. This adds a checkbox to toggle between
rescaling, and resizing which blits the existing canvas to
the top left of the new, resized canvas.

As part of this, a new ScalingMode is added to
LibGfx - None.

2 files changed, 9 insertions, 0 deletions

diff --git a/Userland/Libraries/LibGfx/Painter.cpp b/Userland/Libraries/LibGfx/Painter.cpp
index bfd566709b..9773b58fc3 100644
--- a/Userland/Libraries/LibGfx/Painter.cpp
+++ b/Userland/Libraries/LibGfx/Painter.cpp
@@ -1248,6 +1248,9 @@ ALWAYS_INLINE static void do_draw_scaled_bitmap(Gfx::Bitmap& target, IntRect con
     case Painter::ScalingMode::BilinearBlend:
         do_draw_scaled_bitmap<has_alpha_channel, Painter::ScalingMode::BilinearBlend>(target, dst_rect, clipped_rect, source, src_rect, get_pixel, opacity);
         break;
+    case Painter::ScalingMode::None:
+        do_draw_scaled_bitmap<has_alpha_channel, Painter::ScalingMode::None>(target, dst_rect, clipped_rect, source, src_rect, get_pixel, opacity);
+        break;
     }
 }
 
@@ -1262,6 +1265,11 @@ void Painter::draw_scaled_bitmap(IntRect const& a_dst_rect, Gfx::Bitmap const& s
     if (scale() == source.scale() && a_src_rect == int_src_rect && a_dst_rect.size() == int_src_rect.size())
         return blit(a_dst_rect.location(), source, int_src_rect, opacity);
 
+    if (scaling_mode == ScalingMode::None) {
+        IntRect clipped_draw_rect { (int)a_src_rect.location().x(), (int)a_src_rect.location().y(), a_dst_rect.size().width(), a_dst_rect.size().height() };
+        return blit(a_dst_rect.location(), source, clipped_draw_rect, opacity);
+    }
+
     auto dst_rect = to_physical(a_dst_rect);
     auto src_rect = a_src_rect * source.scale();
     auto clipped_rect = dst_rect.intersected(clip_rect() * scale());
diff --git a/Userland/Libraries/LibGfx/Painter.h b/Userland/Libraries/LibGfx/Painter.h
index 3405d0befd..845978ce1b 100644
--- a/Userland/Libraries/LibGfx/Painter.h
+++ b/Userland/Libraries/LibGfx/Painter.h
@@ -38,6 +38,7 @@ public:
         NearestNeighbor,
         SmoothPixels,
         BilinearBlend,
+        None,
     };
 
     void clear_rect(IntRect const&, Color);